The Presence of Coliform Bacteria in a Source of Drinking

question 24

Multiple Choice

The presence of coliform bacteria in a source of drinking water indicates

• A)that it has been contaminated with human or animal waste.
• B)that it contains toxic materials.
• C)that it has a high biochemical oxygen demand.
• D)All of these are correct statements.

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Definitions:

Marginal Profit

The additional profit earned from selling one more unit of a product or service.

Marginal Revenue

The incremental profit made from the sale of an additional unit of a good or service.

Marginal Cost

The increment in overall expenses due to the output of one more unit of a product or service.

Marginal Revenue

The augmented income received from selling an extra unit of a good or service.